CN211180364U - Multi-axis optical anti-shake and focusing device, camera module, and electronic apparatus - Google Patents

Abstract

The utility model discloses a multiaxis optics anti-shake and focusing device, camera module and electronic equipment. A multi-axis optical anti-shake and focus apparatus comprising: the SMA optical anti-shake actuator comprises a movable plate and an SMA wire; the upper SMA actuator is connected to the movable plate and comprises a second SMA wire, a driven piece and two first terminals, and the second SMA wire is connected between the two first terminals in series; the upper SMA actuators are provided with at least 2; the circuit board is connected to the movable plate and comprises an insulating layer, a plurality of first leads, a plurality of third touch plates and a plurality of fourth touch plates, the third touch plates and the fourth touch plates correspond to the first leads one by one and are respectively connected to two ends of the first leads, and the fourth touch plates are connected with the first wiring ends; the mirror frame body, every driven piece all is connected on the mirror frame body. The utility model discloses can compensate the influence that the camera lens deflected and brought through pivoted form to improve imaging quality, and make overall circuit structure simpler.

Description

Multi-axis optical anti-shake and focusing device, camera module, and electronic apparatus

Technical Field

The utility model relates to an anti-shake technical field makes a video recording, in particular to multiaxis optics anti-shake and focusing device, camera module and electronic equipment.

Background

At present, cameras with automatic focusing or anti-shaking functions are widely applied to intelligent products such as mobile phones, automobiles, unmanned planes and security monitoring. The common micro automatic focusing camera usually adopts a voice coil motor to drive a lens to move up and down along the optical axis of the lens, thereby realizing automatic focusing; however, in the process of taking a picture or taking a picture, the lens usually cannot be kept in absolute balance due to the shaking of the user, and therefore, the lens may be deviated or deflected to some extent.

In order to improve the above problems, an optical anti-shake apparatus has been developed, which adds an optical anti-shake actuator capable of driving an auto-focus voice coil motor and a lens to move together on a plane perpendicular to an optical axis of the lens, on the basis of the auto-focus voice coil motor, so as to drive the lens to move in two directions perpendicular to the optical axis to compensate for the above offset; although the optical anti-shake device can help the camera to obtain better image quality to a great extent, the optical anti-shake device can only compensate the offset of three axial positions which are mutually perpendicular to an X axis, a Y axis and a Z axis (optical axis), and the influence on the deflection of the lens is difficult to eliminate more effectively.

In order to further eliminate the effect of lens deflection, more actuators are required to drive the lens to move or deflect in different directions, which makes the optical anti-shake apparatus need to be configured with a very complicated line connection structure, which results in a complicated overall structure of the optical anti-shake apparatus, and is not favorable for miniaturization and low cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a circuit connection more reasonable, the more compact multiaxis optics anti-shake and focusing device of structure, camera module and electronic equipment.

The technical scheme adopted for solving the technical problems is as follows:

a multi-axis optical anti-shake and focus apparatus comprising: the SMA optical anti-shake actuator comprises a movable plate and a first SMA wire, wherein one end of the first SMA wire is connected with the movable plate, and the first SMA wire is electrified and contracted to drive the movable plate to move in an XY plane; the upper SMA actuator is connected to the movable plate and comprises a second SMA wire, a driven piece and two first terminals, the second SMA wire is connected between the two first terminals in series, and the driven piece can be driven to move along the Z axis by electrifying and contracting the second SMA wire; the number of the upper SMA actuators is at least 2; the circuit board is connected to the movable plate and comprises an insulating layer, a plurality of first wires, a plurality of third touch plates and a plurality of fourth touch plates, the third touch plates and the fourth touch plates correspond to the first wires one by one and are respectively connected to two ends of the first wires, the insulating layer enables the first wires, the third touch plates and the fourth touch plates to be isolated and insulated from the movable plate, and the fourth touch plates are connected with the first wiring ends; the center of the frame body is provided with a lens mounting hole with an axis parallel to the Z axis, and each driven piece is connected to the frame body.

The multi-axis optical anti-shake and focusing device has at least the following beneficial effects:

the at least two upper SMA actuators are arranged to drive different driven pieces on the lens frame body to move along the Z axis, so that the lens frame body can rotate, the multi-axis optical anti-shake and focusing device can also compensate the influence caused by lens deflection in a rotating mode, and the imaging quality is improved. In addition, the movable plate is provided with the circuit board, and the structures such as the first lead, the third contact plate, the fourth contact plate and the like arranged on the circuit board are connected with the first wiring terminal in the upper SMA actuator, so that the excessive lead structure can be avoided, and each upper SMA actuator can be connected with an external control circuit only through the third contact plate, so that the whole circuit structure can be simpler, and the miniaturization and the low cost of the multi-axis optical anti-shake and focusing device are facilitated.

In a possible embodiment of the present invention, each of the upper SMA actuators has one of the first terminals as a first common terminal and the other of the first terminals as a first control terminal, the first common terminals are electrically connected to each other through a conductor, one of the fourth contact plates is connected to any one of the first common terminals, and the rest of the fourth contact plates are connected to the first control terminal in a one-to-one correspondence. Through mutually electrically connecting first public end, under the condition that does not influence each upper portion SMA actuator mutual independent control, can effectively reduce the quantity of first wire, third touch panel and fourth touch panel, be favorable to simplifying the structure of circuit board, reduce cost.

The utility model discloses an among the possible embodiment, multiaxis optics anti-shake and focusing device is still including sliding seat and spring, the sliding seat is connected on the fly leaf, upper portion SMA actuator is connected on the sliding seat, the spring with mirror holder body fixed connection, the spring is equipped with a plurality of second elastic arms, the one end of second elastic arm with the sliding seat is connected, the second elastic arm makes spring support the mirror holder body makes the mirror holder body is relative the sliding seat is movable. The mirror frame body can be in an elastic suspension state on the movable seat through the second elastic arm, so that the mirror frame body is easier to drive relative to each upper SMA actuator.

In a possible embodiment of the present invention, the spring is made of conductive material, and the first common terminal is electrically connected to the second common terminal through the spring, so as to further reduce external wires and simplify the circuit.

In a possible embodiment of the present invention, the movable plate is movably erected on a fixed plate, the fixed plate is fixed on the upper surface of the substrate, a third elastic arm is disposed at an edge of the movable plate, a free end of the third elastic arm is fixed on the fixed plate, and the movable plate can move relative to the fixed plate under the constraint of the third elastic arm; the first SMA wire is provided with a plurality of pieces, and two ends of the first SMA wire are respectively connected with the fixed plate and the movable plate. Through setting up the elastic arm and making the movable plate erects in the fixed plate top to through making the second SMA line circular telegram that corresponds contract can make the fly leaf remove in the XY plane of fixed plate top.

The utility model discloses an in a possible embodiment, the fly leaf with the fixed plate is the conductor, the fixed plate is provided with the polylith, the third elastic arm with one of them the fixed plate is connected, all the other the fixed plate with first SMA wire one-to-one is connected, every the edge of fixed plate all is formed with the fifth touch panel, the fifth touch panel is buckled downwards and is passed the base plate. Through setting the fixed plate to the polylith to adopt conductor material together with the fly leaf, can be so that the fixed plate of being connected with first SMA wire forms the second control end, and the fixed block of being connected with third elastic arm forms the second common port, thereby under the condition that does not influence each first SMA wire mutual independent control, can effectively reduce the external connection wire, be favorable to simplifying the circuit connection structure among the SMA optics anti-shake actuator, and reduce cost.

In a possible embodiment of the present invention, the third elastic arm is formed with a downward bending end and passes through the support sheet of the substrate, and the third touch pad is located at a position corresponding to the support sheet, and the support sheet supports and bears the third touch pad. The supporting sheet is arranged, so that the third touch panel structure in the circuit board is located below the substrate, the third touch panel structure can be located on the outer side of the whole multi-axis optical anti-shake and focusing device, and the third touch panel structure is convenient to electrically connect with an external circuit.

The utility model discloses an in a possible implementation, the circuit board is still including second wire and sixth touch panel, be provided with controller and position sensor on the circuit board, second wire one end is connected controller and/or position sensor, and the other end is connected the sixth touch panel. The position sensor can be used for feeding back the position of the lens frame body and the lens in the Z direction and the inclination angles around the X axis and the Y axis, the controller can be used for controlling the upper SMA actuator to drive the lens frame body to perform compensation according to the position and the inclination angles, and the sixth touch panel is used for enabling the controller and the position sensor to be electrically connected with an external circuit.

The camera module comprises the multi-axis optical anti-shake and focusing device.

An electronic device comprising the multi-axis optical anti-shake and focusing apparatus or the camera module.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded schematic view of a multi-axis optical anti-shake and focusing apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a circuit board according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the circuit board of the embodiment of the present invention after the insulating layer is removed;

fig. 4 is a schematic structural diagram of a fixing plate according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a movable plate according to an embodiment of the present invention;

fig. 6 is a schematic view of a connection structure between a movable plate and a fixed plate according to an embodiment of the present invention;

fig. 7 is a schematic view of a connection structure between a movable plate and a circuit board according to an embodiment of the present invention;

fig. 8 is a schematic view of a connection structure of an upper SMA actuator, a frame body, a spring, and a base according to an embodiment of the present invention;

fig. 9 is a schematic structural view of an upper SMA actuator according to an embodiment of the present invention with the driven member removed;

fig. 10 is a schematic view of a connection structure of an upper SMA actuator and a circuit board according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a base according to an embodiment of the present invention;

fig. 12 is a schematic view of the connection structure between the frame body and the spring according to the present invention.

Reference numerals:

the SMA optical anti-shake actuator 1, the fixed plate 110, the first contact plate 111, the fifth contact plate 112, the movable plate 120, the third elastic arm 121, the support sheet 122, the second contact plate 123, the carrier sheet 124, the first SMA wire 130, and the support bearing 140;

the upper SMA actuator 2, the first upper SMA actuator 20a, the second upper SMA actuator 20b, the second SMA wire 210, the driven member 220, the hinge post 221, the actuating body 230, the support 231, the link 232, the first resilient arm 233, the connecting portion 234, the first common end 240, the first control end 250;

the lens holder body 3, the lens mounting hole 310 and the embedding groove 320;

a movable seat 4 and a connecting column 410;

spring 5, second elastic arm 510;

a substrate 6 and a lid 7;

the circuit board 8, the first wire 810, the third touch pad 820, the fourth touch pad 830, the sixth touch pad 840, the second wire 850, and the controller 860.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 12, a camera module according to the present invention includes a multi-axis optical anti-shake and focusing apparatus.

Multi-axis optics anti-shake and focusing device includes the lens holder body 3, SMA optics anti-shake actuator 1, circuit board 8 and two at least upper portion SMA actuators 2.

The SMA optical anti-shake actuator 1 includes a movable plate 120 and a first SMA wire 130 having one end connected to the movable plate 120, wherein the first SMA wire 130 is electrically contracted to drive the movable plate 120 to move in an XY plane;

and the upper SMA actuator 2 is connected to the movable plate 120 and comprises a second SMA wire 210, a driven member 220 and two first terminals, the second SMA wire 210 is connected in series between the two first terminals, and the driven member 220 is driven to move along the Z axis by the electrification and contraction of the second SMA wire 210.

The circuit board 8 is connected to the movable plate 120, and includes an insulating layer, a first wire 810, a third touch panel 820 and a fourth touch panel 830, the first wire 810, the third touch panel 820 and the fourth touch panel 830 are all provided with a plurality of wires, the third touch panel 820 and the fourth touch panel 830 correspond to the first wire 810 one by one and are respectively connected to two ends of the first wire 810, the insulating layer enables the first wire 810, the third touch panel 820 and the fourth touch panel 830 to be isolated and insulated from the movable plate 120, and the fourth touch panel 830 is connected to the first terminal.

The lens frame body 3, the center is equipped with the camera lens mounting hole 310 that the axis is on a parallel with the Z axle, and the camera lens can be installed in camera lens mounting hole 310 to make the camera lens optical axis be on a parallel with the Z axle under normal condition, every driven piece 220 all connects on the lens frame body 3.

The multi-axis optical anti-shake and focusing device has at least the following beneficial effects:

the SMA optical anti-shake actuator 1 and the upper SMA actuator 2 both generate driving force to drive the lens frame body 3 to move through the contraction of the SMA wires, so that the normal work of other electronic elements cannot be influenced by the generation of electromagnetic interference;

the at least two upper SMA actuators 2 are arranged to drive different driven members 220 on the lens frame body 3 to move along the Z axis, when the moving amount of the driven members 220 along the Z axis is consistent, the whole lens frame body 3 can be subjected to Z-direction movement compensation, and when the moving amount of the driven members 220 along the Z axis is inconsistent, the lens frame body 3 can be rotated, so that the multi-axis optical anti-shake and focusing device can also compensate the influence caused by lens deflection in a rotating manner, and the imaging quality is improved;

further, by providing the circuit board 8 on the movable plate 120 and connecting the first terminals of the upper SMA actuators 2 with the first lead 810, the third contact 820, and the fourth contact 830 provided on the circuit board 8, it is possible to avoid an excessive lead structure from being externally provided, and each of the upper SMA actuators 2 can be connected to an external control circuit only through the third contact 820, so that the overall circuit structure can be made simpler, which is advantageous for downsizing and cost reduction of the multi-axis optical anti-shake and focusing apparatus.

Regarding the movable plate 120, the movable plate 120 is disposed above the fixed plate 110, the fixed plate 110 is fixedly connected to the substrate 6, the movable plate 120 is movable relative to the fixed plate 110, and for simplifying the overall circuit, the movable plate 120 is preferably made of an electrically conductive metal material, and the movable plate 120 has certain elasticity.

As for the driven member 220, the driven member 220 can be formed with the frame body 3 or fixedly connected to the frame body 3, and in this embodiment, the driven member 220 is preferably formed integrally with the frame body 3.

With respect to the first SMA wire 130 and the second SMA wire 210, the SMA wires are shape memory alloy wires that achieve length contraction before and after energization.

As for the wiring board 8, the wiring board 8 may be an FPC wiring board 8 or another type of wiring board 8 as long as it is ensured that the insulating layer enables the first wires 810 to be isolated from each other and not to contact each other, and the first wires 810, the third touch panel 820 and the fourth touch panel 830 to be insulated from the movable plate 120, and in this embodiment, the FPC wiring board 8 is preferably used for the wiring board 8.

In an embodiment, the driven members 220 are uniformly distributed around the central axis of the lens mounting hole 310. The positions and distances of each driven member 220 and the lens center can be consistent by uniformly distributing the driven members around the central axis of the lens mounting hole 310, so that the control and adjustment of each upper SMA actuator 2 are facilitated.

In an embodiment, the upper SMA actuator 2 includes two actuating bodies 230, each of the actuating bodies 230 includes a link 232, a support portion 231, and a first elastic arm 233, one end of the link 232 is connected to the second SMA wire 210, one end of the link 232 is elastically connected to the support portion 231, the first elastic arm 233 is disposed between the link 232 and the support portion 231, the first elastic arm 233 is elastically bendable, one end of the link 232 is hinged to the driven member 220, the second SMA wire 210 can drive the link 232 to swing with respect to the support portion 231 by contraction, and the link 232 can drive the driven member 220 to move along the Z axis. The link rod 232 can elastically swing relative to the support part 231 through the first elastic arm 233, so that the displacement of the driven part 220 and the focus ring can be larger than the contraction of the second SMA wire 210, and a larger adjusting stroke can be realized under the condition that the size of the upper SMA actuator 2 is smaller, which is beneficial to the miniaturization of the whole multi-axis optical anti-shake and focusing device.

Regarding the supporting portion 231, the supporting portion 231 is connected to the movable plate 120, specifically, the supporting portion 231 is fixedly connected to the movable seat 4, the movable seat 4 is connected to the circuit board 8, the connecting rod 232 and the driven member 220 are movable relative to the supporting portion 231, and the supporting portion 231 constitutes the first terminal.

Regarding the first elastic arm 233, the first elastic arm 233 is made of an elastic material, and can be bent when the second SMA wire 210 is contracted. The first elastic arm 233 is in the shape of a bar, and one end of the first elastic arm 233 is connected to the support portion 231 and the other end is connected to the link 232.

As for the link 232, the link 232 is a rod having a certain rigidity, and can support the driven member 220 and the lens frame body 3, etc. for displacement.

In the present embodiment, the supporting portion 231, the first elastic arm 233 and the link 232 are integrally formed by a conductive material. The support 231, the first elastic arm 233 and the connecting rod 232 are integrally formed, so that the manufacturing difficulty and cost of the upper SMA actuator 2 are reduced, the support 231, the first elastic arm 233 and the connecting rod 232 can be made of SMA wires by conductive materials, and the overall circuit structure of the multi-axis optical anti-shake and focusing device is simplified.

The support 231, the first elastic arm 233, and the link 232 are integrally formed of a metal material, and thus have both excellent elasticity and conductivity.

In the present embodiment, the two actuating bodies 230 in the same upper SMA actuator 2 are symmetrically arranged, and the symmetrical arrangement of the supporting portion 231, the first elastic arm 233 and the connecting rod 232 can enhance the stability of the movement of the driven member 220.

Regarding the driven member 220, a protruding hinge pillar 221 is disposed on the driven member 220, and a hinge ring is disposed at one end of the connecting rod 232 and sleeved on the hinge pillar 221 to form a hinge mechanism. In this embodiment, two hinge columns 221 are provided, and two connecting rods 232 in the same upper SMA actuator 2 are respectively hinged with the two hinge columns 221. Of course, in other embodiments, only one hinge pillar 221 may be provided on the driven member 220, and both the two connecting rods 232 in the same upper SMA actuator 2 are hinged through the hinge pillar 221, and the two connecting rods 232 are insulated from each other at the hinged position by the spacer.

In the present embodiment, specifically, the number of the upper SMA actuators 2 is 4, and two opposite upper SMA actuators 2 are taken as one group, so that the two groups are divided into two groups to respectively correspondingly control the mirror body frame and the lens to realize rotation control around the X axis and the Y axis; for example, taking the rotation control around the X axis as an example, when the lens needs to be controlled to rotate around the X axis, the two upper SMA actuators 2 connected to the driven member 220 and parallel to the X axis do not operate, and the other two upper SMA actuators 2 drive the driven member 220 to generate different Z axis displacements, so that the lens frame 3 and the lens rotate around the X axis; when only the Z-direction displacement needs to be generated, the four upper SMA actuators 2 are simultaneously activated, and the displacement amount of each driven member 220 is made uniform.

Of course, in other embodiments, the number of the upper SMA actuators 2 may be 2, 3 or more than 4; for example, when only 2 upper SMA actuators 2 are used, it is difficult to simultaneously rotate around the X-axis and the Y-axis, and it is suitable to rotate around the X-axis or the Y-axis to compensate for the anti-shake; the adoption of 3 upper SMA actuators 2 requires the cooperation of three upper SMA actuators 2 to facilitate the resultant rotation around the X axis or the Y axis, so that the control is not easy; while providing more than 4 upper SMA actuators 2 tends to increase costs.

Also, in the present embodiment, the upper SMA actuator 2 is divided into a first upper SMA actuator 20a and a first SMA focus actuating second upper SMA actuator 20b, the second SMA wire 210 of the first upper SMA actuator 20a being arranged between the connecting rod 232 and the movable plate 120, the connecting rod 232 of the first SMA focus actuating second upper SMA actuator 20b being arranged between the second SMA wire 210 and the movable plate 120. The multi-axis optical anti-shake and focusing device comprises at least one first upper SMA actuator 20a and at least one first SMA focus actuating second upper SMA actuator 20b, and the relative positions of the connecting rod 232 in the first upper SMA actuator 20a and the first SMA focus actuating second upper SMA actuator 20b, the second SMA wire 210 and the movable plate 120 are different, so that the mirror frame can be driven to the opposite direction, and the mirror frame can be driven to move to more directions, thereby being beneficial to expanding the focusing and anti-shake functions of the multi-axis optical anti-shake and focusing device.

With respect to the upper SMA actuators 2, preferably each upper SMA actuator 2 surrounds the frame body 3.

In this embodiment, preferably the first upper SMA actuators 20a are two in number and symmetrically arranged about the housing body 3 and the first SMA focus actuating second upper SMA actuators 20b are two in number and symmetrically arranged about the housing body 3. The two first upper SMA actuators 20a and the two first SMA focusing actuation second upper SMA actuators 20b are respectively arranged symmetrically with respect to the frame body 3, and by respectively controlling the upper SMA actuators 2, detection or control of the inclination angle and displacement of the frame body 3 and the lens can be realized, which is beneficial to further expanding the anti-shake and focusing functions of the camera module.

With respect to the first upper SMA actuator 20a and the first SMA focus actuation second upper SMA actuator 20b, the differences are contrastable from fig. 1, 8 and 9. When the second SMA wire 210 contracts, the connecting rod 232 of the first upper SMA actuator 20a swings in a direction away from the movable plate 120, thereby driving the mirror frame body 3 away from the movable plate 120. When the second SMA wire 210 contracts, the first SMA focus actuates the connecting rod 232 of the second upper SMA actuator 20b to swing in a direction approaching the movable plate 120, thereby driving the frame body 3 approaching the movable frame.

In this embodiment, each of the upper SMA actuators 2 has one of the first terminals as a first common terminal 240 and the other of the first terminals as a first control terminal 250, the first common terminals 240 are electrically connected to each other through a conductor, one of the fourth contact plates 830 is connected to any one of the first common terminals 240, and the remaining fourth contact plates 830 are connected to the first control terminals 250 in a one-to-one correspondence manner. By electrically connecting the first common terminals 240 to each other, the number of the first wires 810, the third contact pads 820 and the fourth contact pads 830 can be effectively reduced without affecting the independent control of the upper SMA actuators 2, which is beneficial to simplifying the structure of the circuit board 8 and reducing the cost.

With respect to the first control end 250 and the first common end 240, the 4 upper SMA actuators 2 enclose a quadrilateral structure, wherein four supports 231 located at one set of diagonal positions of the quadrilateral structure constitute the first common end 240, and four supports 231 located at the other set of diagonal positions constitute the first control end 250. Four convex fourth touch panels 830 are disposed on the circuit board 8 corresponding to the four supporting portions 231 of the first control end 250, and the bottoms of the four supporting portions 231 of the first control end 250 are respectively connected to the four fourth touch panels 830; a horizontally bent connecting portion 234 is formed at the bottom of one of the supporting portions 231 forming the first common terminal 240, and a fourth contact 830 connected to the connecting portion 234 is disposed at a position of the circuit board 8 corresponding to the end of the connecting portion 234. The edge of the movable plate 120 is provided with a bearing sheet 124 protruding outwards at a position corresponding to each fourth touch plate 830, for supporting and bearing the fourth touch plate 830.

Multiaxis optics anti-shake and focusing device is including sliding seat 4 and spring 5, sliding seat 4 connects on the fly leaf 120, upper portion SMA actuator 2 connects on sliding seat 4, spring 5 with frame body 3 fixed connection, spring 5 is equipped with a plurality of second elastic arms 510, the one end of second elastic arm 510 with sliding seat 4 connects, second elastic arm 510 makes spring 5 supports frame body 3 makes frame body 3 is relative sliding seat 4 is movable.

The two springs 5 are provided in total and are respectively attached to the upper and lower surfaces of the frame body 3, the springs 5 and the second elastic arms 510 are integrally formed as metal pieces, and the second elastic arms 510 allow the frame body 3 to be elastically suspended on the movable base 4, thereby facilitating driving of the frame body 3 on each upper SMA actuator 2. Here, the spring 5 does not mean a coil spring 5, a spiral spring 5 or a plate spring 5 which is common in the mechanical field, but is a special spring 5 which is used exclusively for suspending the housing body 3.

Regarding movable seat 4, four corners of movable seat 4 all are provided with four spliced poles 410 that extend to frame body 3 one side, and the side at spliced pole 410 is all connected to the supporting part 231 in upper portion SMA actuator 2, and the second elastic arm 510 of connecting the frame body 3 upper surface is connected to spliced pole 410 top.

In this embodiment, the spring 5 is made of a conductive material, and the first common terminal 240 is electrically connected to the spring 5, so as to further reduce external wires and simplify the circuit. And, specifically, the top of the supporting portion 231 protrudes from the top end of the connecting column 410, the spring 5 connected above the housing body 3 has a portion of the second elastic arm 510 in contact with the 4 supporting portions 231 constituting the first common terminal 240.

In this embodiment, the movable plate 120 is movably erected on the fixed plate 110, the fixed plate 110 is fixed on the upper surface of the substrate 6, a third elastic arm 121 is disposed at an edge of the movable plate 120, a free end of the third elastic arm 121 is fixed on the fixed plate 110, and the movable plate 120 can move relative to the fixed plate 110 under the constraint of the third elastic arm 121; the first SMA wire 130 is provided with a plurality of pieces, and both ends of the first SMA wire 130 are respectively connected to the fixed plate 110 and the movable plate 120. By providing the elastic arm and mounting the movable plate 120 above the fixed plate 110, the movable plate 120 can be moved in the XY plane above the fixed plate 110 by electrically contracting the corresponding second SMA wire 210.

In the present embodiment, in order to reduce friction between the movable plate 120 and the fixed plate 110, preferably, a plurality of support bearings are disposed between the movable plate 120 and the fixed plate 110.

Regarding the third elastic arm 121, two of the third elastic arms 121 are substantially L-shaped and are respectively disposed on two opposite corners of the body of the movable plate 120, and a gap is formed between the third elastic arm 121 and the body of the movable plate 120 to allow the movable plate 120 to move.

In this embodiment, the movable plate 120 and the fixed plate 110 are both conductors, the fixed plate 110 is provided with a plurality of blocks, the third elastic arm 121 is connected to one of the fixed plates 110, the other fixed plates 110 are connected to the first SMA wires 130 in a one-to-one correspondence, a fifth contact plate 112 is formed on an edge of each fixed plate 110, and the fifth contact plate 112 is bent downward and penetrates through the substrate 6. By arranging the fixed plates 110 into a plurality of blocks and using a conductor material together with the movable plate 120, the fixed plates 110 connected with the first SMA wires 130 can form a second control end, and the fixed blocks connected with the third elastic arms 121 form a second common end, so that under the condition that the mutual independent control of the first SMA wires 130 is not influenced, external connecting wires can be effectively reduced, the circuit connection structure in the SMA optical anti-shake actuator 1 is facilitated to be simplified, and the cost is reduced. And, by bending the fifth contact plate 112 downwards and passing through the substrate 6, the fifth contact plate 112 structure can be located outside the whole multi-axis optical anti-shake and focusing device, thereby facilitating the electrical connection with the external circuit.

Of course, in some other embodiments, the fixing plate 110 may be formed as a single piece, and a circuit board structure is disposed on the fixing plate, and the circuit board structure is used to connect the first SMA wire 130 and is insulated from the fixing plate 110, so as to facilitate controlling the first SMA wire 130 by power.

In the present embodiment, the first touch panel 111 is disposed on one set of opposite corners of the fixed panel 110, and the second touch panel 123 is disposed on the other set of opposite corners of the movable panel 120. The first SMA wires 130 are provided with four pieces and respectively correspond to four sides of the movable plate 120, and two ends of the first SMA wires 130 are respectively connected to the first touch plate 111 and the second touch plate 123. The fixed plate 110, the movable plate 120 and the first SMA wire 130 can be conveniently connected by arranging the first contact plate 111 and the second contact plate 123, and by arranging 4 second SMA wires 210, two of the second SMA wires 210 parallel to the X axis can respectively drive the movable plate 120 to move along two directions of the X axis, namely the forward direction and the reverse direction, and two of the second SMA wires 210 parallel to the Y axis can respectively drive the movable plate 120 to move along two directions of the Y axis, namely the forward direction and the reverse direction, so that the expansion of the focusing and anti-shake functions of the multi-axis optical anti-shake and focusing device is facilitated.

Regarding the second touch pad 123, the second touch pad 123 is disposed on a set of opposite corners of the movable board 120 where the third elastic arm 121 is not disposed, and the first touch pad 111 is disposed on a set of opposite corners of the fixed board 110 corresponding to the position of the third elastic arm 121.

Of course, in other embodiments, 1, 2, 3, or more than 4 first SMA wires 130 may be optionally disposed according to actual needs.

In a possible embodiment of the present invention, the end of the third elastic arm 121 is formed with a support sheet 122 bent downward and passing through the substrate 6, the shape of the circuit board 8 is adapted to the movable plate 120, the third touch plate 820 is located at a position corresponding to the support sheet 122, and the support sheet 122 supports and bears the third touch plate 820. The supporting sheet 122 is disposed to enable the third contact 820 structure in the circuit board 8 to be located below the substrate 6, so that the third contact 820 structure can be located outside the entire multi-axis optical anti-shake and focusing apparatus, thereby facilitating electrical connection with an external circuit.

In a possible embodiment of the present invention, the circuit board 8 further includes a second wire 850 and a sixth touch pad 840, the circuit board 8 is provided with a controller 860 and a position sensor (not shown in the drawings), one end of the second wire 850 is connected to the controller 860 and the position sensor, and the other end is connected to the sixth touch pad 840. A position sensor may be used to feedback the position of the frame body 3 and lens in the Z direction and tilt about the X and Y axes, a controller 860 may be used to control the upper SMA actuator 2 to drive the frame body 3 to compensate for the movement according to the position and tilt, and a sixth touch pad 840 is used to electrically connect the controller 860 and the position sensor to external circuitry.

As for the position sensor, the housing body 3 is provided with a magnet at a position corresponding to the position sensor, so that the positions and inclination angles of the housing body 3 and the lens are known by the position sensor detecting a change in the magnetic field.

Regarding the mirror frame body 3, the mirror frame body 3 is provided with an embedded groove 320 facing the position sensor, the magnet is installed in the embedded groove 320, and the position sensor and the magnet are provided in plurality, and preferably 4 in the present embodiment.

Regarding the sixth touch panel 840, the supporting pieces 122 bent downward and passing through the substrate 6 are formed at the ends of the two third elastic arms 121, the sixth touch panel 840 is also located at the corresponding position of the supporting pieces 122, and the sixth touch panel 840 and the third touch panel 820 are respectively disposed on different supporting pieces 122.

In this embodiment, the multi-axis optical anti-shake and focusing apparatus further includes a substrate 6 and a cover 7, the cover 7 covers the substrate 6 and forms an accommodating cavity, the lens frame body 3, the SMA optical anti-shake actuator 1, the upper SMA actuator 2, the movable seat 4, and the like are all disposed in the accommodating cavity, and a through hole is formed in a position of the top of the cover 7 corresponding to the lens mounting hole 310. The provision of the substrate 6 and the cover 7 enables the multi-axis optical anti-shake and focusing apparatus to constitute a whole integrated module.

The camera module comprises the multi-axis optical anti-shake and focusing device.

An electronic device comprising the multi-axis optical anti-shake and focusing apparatus or the camera module.

Claims (10)

1. Multi-axis optical anti-shake and focusing apparatus, comprising:

the SMA optical anti-shake actuator comprises a movable plate and a first SMA wire, wherein one end of the first SMA wire is connected with the movable plate, and the first SMA wire is electrified and contracted to drive the movable plate to move in an XY plane;

the upper SMA actuator is connected to the movable plate and comprises a second SMA wire, a driven piece and two first terminals, the second SMA wire is connected between the two first terminals in series, and the driven piece can be driven to move along the Z axis by electrifying and contracting the second SMA wire; the number of the upper SMA actuators is at least 2;

the circuit board is connected to the movable plate and comprises an insulating layer, a plurality of first wires, a plurality of third touch plates and a plurality of fourth touch plates, the third touch plates and the fourth touch plates correspond to the first wires one by one and are respectively connected to two ends of the first wires, the insulating layer enables the first wires, the third touch plates and the fourth touch plates to be isolated and insulated from the movable plate, and the fourth touch plates are connected with the first wiring ends;

the center of the frame body is provided with a lens mounting hole with an axis parallel to the Z axis, and each driven piece is connected to the frame body.

2. The multi-axis optical anti-shake and focusing apparatus according to claim 1, wherein: each upper SMA actuator is provided with one first terminal as a first common terminal and the other first terminal as a first control terminal, the first common terminals are electrically connected with each other through a conductor, one fourth contact plate is connected with any one first common terminal, and the rest fourth contact plates are correspondingly connected with the first control terminals.

3. The multi-axis optical anti-shake and focusing apparatus according to claim 2, wherein: the glasses frame is characterized by further comprising a movable seat and a spring, the movable seat is connected to the movable plate, the upper SMA actuator is connected to the movable seat, the spring is fixedly connected with the glasses frame body, the spring is provided with a plurality of second elastic arms, one ends of the second elastic arms are connected with the movable seat, and the second elastic arms enable the spring to support the glasses frame body and enable the glasses frame body to move relative to the movable seat.

4. The multi-axis optical anti-shake and focusing apparatus according to claim 3, wherein: the springs are made of conductive materials, and the first public ends are electrically connected through the springs.

5. The multi-axis optical anti-shake and focusing apparatus according to any one of claims 1 to 4, wherein: the movable plate is movably erected on the fixed plate, the fixed plate is fixed on the upper surface of the substrate, a third elastic arm is arranged at the edge of the movable plate, the free end of the third elastic arm is fixed on the fixed plate, and the movable plate can move relative to the fixed plate under the constraint of the third elastic arm; the first SMA wire is provided with a plurality of pieces, and two ends of the first SMA wire are respectively connected with the fixed plate and the movable plate.

6. The multi-axis optical anti-shake and focusing apparatus according to claim 5, wherein: the movable plate and the fixed plate are both conductors, the fixed plate is provided with a plurality of blocks, the third elastic arm is connected with one of the fixed plates, the other fixed plates are connected with the first SMA wires in a one-to-one correspondence mode, a fifth touch plate is formed at the edge of each fixed plate, and the fifth touch plate bends downwards and penetrates through the substrate.

7. The multi-axis optical anti-shake and focusing apparatus according to claim 5, wherein: the tail end of the third elastic arm is provided with a support sheet which is bent downwards and penetrates through the substrate, the third touch panel is located at a position corresponding to the support sheet, and the support sheet supports and bears the third touch panel.

8. The multi-axis optical anti-shake and focusing apparatus according to claim 5, wherein: the circuit board further comprises a second lead and a sixth touch panel, a controller and/or a position sensor are/is arranged on the circuit board, one end of the second lead is connected with the controller and/or the position sensor, and the other end of the second lead is connected with the sixth touch panel.

9. A camera module characterized by: a multi-axis optical anti-shake and focusing apparatus comprising the multi-axis optical system according to any one of claims 1 to 8.

10. An electronic device, characterized in that: comprising the multi-axis optical anti-shake and focus device of any of claims 1 to 8 or comprising the camera module of claim 9.

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